This will enable us in the future to have technologies that change
projectiles.
This is also somewhat of a refactoring.
Patch By: Mate-86
Reviewed By: wraitii
Trac Tickets: #1909
Differential Revision: https://code.wildfiregames.com/D945
This was SVN commit r20676.
Using references matches the C++ coding style better and should improve
performance a bit in theory. It avoids 2 copies of T in case of the
functions registered with RegisterFunction (mainy used in the GUI). It
should also avoid one or two copies in case of
DEFINE_INTERFACE_METHOD_X, which is used in the simulation, but I
haven't bothered to count it there exactly.
It is now predefined which types have to be passed by const reference
and which are passed by value. Note that references can't be used as
out-parameters (to return multiple values to JS). This hasn't worked
before either and probably never will.
This was SVN commit r17696.
